/Engine/Source/Runtime/MovieScene/Public/Tracks/MovieSceneSubTrack.h
Adds a movie scene section at the requested time.
The newly created sub section
virtual [UMovieSceneSubSection](API\Runtime\MovieScene\Sections\UMovieSceneSubSection) * AddSequenceOnRow ( [UMovieSceneSequence](API\Runtime\MovieScene\UMovieSceneSequence) * Sequence, [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) StartTime, int32 Duration, int32 RowIndex )